China Nonferrous Metallurgy

The current standard method YS/T 1329.3—2019 can accurately determine the content of gold and silver in copper telluride, but it is difficult to meet the requirements of copper smelting enterprises for rapid determination of gold and silver in copper telluride due to its complicated operation and long cycle. In this experiment, acid pretreatment to remove impurities such as copper and tellurium was abandoned, and the optimal detection conditions were explored through a series of experiments. The direct fire assay gravimetric method was established to accurately and quickly determine the content of gold and silver in copper telluride samples. The main characteristic of the method lies in the direct analysis and detection of gold by fire assay gravimetric method, which is not only accurate and efficient, but also suitable for low content (Au＜10g/t) samples. The relative standard deviations (RSDs) of the results of five copper telluride samples determined based on the test method were 0.34%-2.76%, n=7. The addition standard recoveries of gold and silver were 98.7%-101.2% and 97.5%-99.0%, respectively. Gold and silver in copper telluride were determined according to the test method and compared with the results determined by YS/T 1329.3—2019 method, the results were consistent. The test method is suitable for the determination of gold and silver in copper telluride samples during copper smelting, and can be used for daily detection and analysis.